The MDKT assessed knowledge on general issues and insulin use [9], the DKQ assessed general diabetes knowledge [10,11], the PCQ assessed carbohydrate food recognition, carbohydrate food counting and the incorporation of carbohydrate counting in calculating insulin dose [14], whilst the DNT measured numeracy skills for diabetes (food label interpretation, calculation of insulin dose based on blood, glucose and carbohydrate corrections) [15]. The gene discussed is INS; the disease is diabetes mellitus.